Volume 29, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Physiological responses to physical exercise were measured in 203 Sudanese villagers and cleaners of irrigation canals in order to assess the effect of infection on work capacity. The investigations were carried out on economically active males (18–45 years old) of Gezira villages, where no mass antischistosomal treatment or molluscicidal applications had been made. Before the physiological tests, all subjects received antimalarial prophylaxis (chloroquine phosphate). There was a statistically significant difference ( < 0.002) in maximum aerobic power output (O) between villagers and canal cleaners amounting to 18%. There was no such difference between noninfected villagers and villagers with light infection, but the impairment in physical working capacity became manifest when the pattern of intensity of infection changed from light (<1,000 eggs/g) to very heavy (>2,000 eggs/g). Age, body weight, stature, lean body mass, leg muscle volume, and nutritional status were similar for canal cleaners and villagers. However, the villagers had a significantly higher ( < 0.001) mean hemoglobin concentration compared to that of canal cleaners which would at least partly explain the difference in O. The results of this study provide quantitative evidence of the adverse effect of high levels of infection on physical working capacity.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...


Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error